netdev - [PATCH net-next 5/5] net: stmmac: report PCS link changes to phylink

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Message-Id: <E1vevI1-00000002Yp8-3cM3@rmk-PC.armlinux.org.uk>
Date: Sun, 11 Jan 2026 13:15:29 +0000
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next 5/5] net: stmmac: report PCS link changes to phylink

Report PCS link changes to phylink, which will allow phylink's inband
support to respoind to link events once the PCS is appropriately
configured.

An expected behavioural change is that should the PCS report that its
link has failed, but phylink is operating in outband mode and the PHY
reports that link is up, this event will cause the netdev's link to
momentarily drop, making the event more noticable, rather than just
producing a "stmmac_pcs: Link Down" message.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.c
index 28748e7ef7dd..2f826fe7229b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pcs.c
@@ -62,6 +62,8 @@ void stmmac_integrated_pcs_irq(struct stmmac_priv *priv, u32 status,
 		x->irq_pcs_link_n++;
 		dev_info(priv->device, "PCS Link %s\n",
 			 val & GMAC_AN_STATUS_LS ? "Up" : "Down");
+
+		phylink_pcs_change(&spcs->pcs, val & GMAC_AN_STATUS_LS);
 	}
 }
 
-- 
2.47.3